Question

The nutrition label on a bag of potato chips says that a one ounce (28 gram) serving of potato chips has 130 calories. A random sample of 35 bags yielded a sample mean of 135 calories with a standard deviation of 15 calories. Is there evidence that the nutrition label does not provide an accurate measure of calories in the bags of potato chips? You may assume that the number of calories per serving is normally distributed with standard deviation equal to the standard deviation of the sample.

Answer 1

The nutrition label on a bag of potato chips says that a one ounce (28 gram) serving of potato chips has 130 calories and contains ten grams of fat, with three grams of saturated fat. A random sample of 35 bags yielded a sample mean of 134 calories with a standard deviation of 17 calories.